Dutch police have detained two men who flew from Chicago to Amsterdam on Sunday night after U.S. screeners found suspicious-looking items in their checked luggage before they departed, U.S. law enforcement officials said.

Security screeners found a cellphone taped to a Pepto-Bismol bottle, three cellphones taped together and a number of watches taped together, prompting American officials to alert the Dutch authorities.

One of the men was also carrying $7,000 in cash, Washington Post reports.

National prosecutor's office spokesman Martijn Boelhouwer says the two men were arrested Monday morning at Schiphol Airport and were being held there for questioning.

He said Tuesday the men were arrested by airport police after getting off a flight from Chicago and handed over to national investigators, according to The Associated Press.